diff --git a/configure b/configure
index 2c9b3a7..e5be6c7 100755
--- a/configure
+++ b/configure
@@ -627,6 +627,7 @@ ac_includes_default="\
 
 ac_subst_vars='LTLIBOBJS
 vpath_build
+PG_VERSION_NUM
 PROVE
 OSX
 XSLTPROC
@@ -15180,6 +15181,7 @@ PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
 tr '.' '	' |
 $AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"
 
+
 cat >>confdefs.h <<_ACEOF
 #define PG_VERSION_NUM $PG_VERSION_NUM
 _ACEOF
diff --git a/configure.in b/configure.in
index b2c1ce7..c27adc1 100644
--- a/configure.in
+++ b/configure.in
@@ -1984,6 +1984,7 @@ AC_DEFINE_UNQUOTED(PG_VERSION_STR,
 [PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
 tr '.' '	' |
 $AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"]
+AC_SUBST(PG_VERSION_NUM)
 AC_DEFINE_UNQUOTED(PG_VERSION_NUM, $PG_VERSION_NUM, [PostgreSQL version as a number])
 
 
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 7c39d82..659abc5 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -38,6 +38,7 @@ all:
 # PostgreSQL version number
 VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
+VERSION_NUM = @PG_VERSION_NUM@
 
 # Support for VPATH builds
 # (PGXS VPATH support is handled separately in pgxs.mk)